Publications
Details of my papers can also be found on INSPIRE and the ADS.
In this paper we explore the use of the Gegenbauer re-projection technique for time-domain reconstruction in frequency-domain self-force calculations. This approach promises significant improvements over the conventional "EHS" approach to self-force calculations for hyperbolic and highly-eccentric elliptical orbits.
Citation: C. Whittall, L. Barack and O. Long, "Frequency-domain self-force calculations using Gegenbauer reconstruction", arXiv:2509.19439 [gr-qc] [link]
Physical Review D August 2024
In this paper we demonstrate how strong-field self-force information can be used to resum weak-field post-Minkowskian series for the scatter angle during hyperbolic encounters, significantly extending the latter's domain of validity.
Citation: O. Long, C. Whittall and L. Barack, "Black hole scattering near the transition to plunge: Self-force and resummation of post-Minkowskian theory", Phys. Rev. D 110, 044039 (2024), arXiv:2406.08363 [gr-qc] [link]
Physical Review D September 2023
In this paper we develop a frequency-domain code to calculate the scalar-field self-force along hyperbolic orbits in the Schwarzschild spacetime. Chosen as an Editors' Selection in Physical Review D and recipient of the 2023 STAG Research Center prize for best student publication in gravitational physics.
Citation: C. Whittall and L. Barack, "Frequency-domain approach to self-force in hyperbolic scattering", Phys. Rev. D 108, 064017 (2023), arXiv:2305.09724 [gr-qc] [link]
